SC4505MLTRT Ver la hoja de datos (PDF) - Semtech Corporation

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componentes Descripción

Fabricante

SC4505MLTRT

High Efficiency Boost Converter for Backlight/Flash LED Driver

Semtech Corporation 

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: VIN = 3.6V, -40°C < TA = TJ < 85°C, , RO1SET=6.98KΩ RO2SET=1.54KΩ

Parameter

Test Conditions

EN_FL, FL_TRB, EN_BL

Input Current

VEN_FL = 0V to 4.7V

EN_BL PWM Dimming

Control Frequency

Note 1

EN_BL PWM Dimming

Control Duty Cycle

FPWM=32kHz , Note 1

FTO Sourcing Current

EN_FL = FL_TRB = 1

FTO Trip Threshold Voltage

FTO Pull Down Current

EN_FL = 1, FL_TRB = 0

Overvoltage Protection

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

Backlight Current Accuracy ( I O1 )

Max Backlight Current ( I O1 )

Flash Current Accuracy ( I O2 )

Max Flash Current ( I O2 )

Torch Output Current ( I O2 )

IO1 Off Leakage Current

IO2 Off Leakage Current

VO Pulldown in Overvoltage Fault

Note 1: Guaranteed by Design

EN_BL = 1

TJ = 25°C, RO1SET =6.98KΩ

EN_FL = FL_TRB = 1

TJ = 25°C, RO2SET =1.54KΩ

EN_FL=1, FL_TRB=0

TJ = 25°C, RO2SET =1.54KΩ

VIO1 =28V

VIO2 =28V

SC4505

Min

Typ

Max Unit

0.01

1

µA

50

50K

Hz

12

100

%

1.2

µA

1.25

V

2.6

mA

28

V

155

°C

10

°C

19

20

21

mA

75

mA

92

100

108

mA

125

mA

18

mA

0.1

1

µA

0.1

1

µA

7

KΩ

 2007 Semtech Corp.

3

www.semtech.com

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